Hill Marble buys and then resells a single product. The product, a marble, is a commodity and is subject to rather severe cost fluctuations. Some information concerning Hill Marble inventory activity during the month of June 2020 follows: June Had 860 units on hand, @ $7 per unit June 6 Sold 400 units June 8 Purchased 1,000 units @ $11 per unit June 12 Purchased 400 units @ $9 per unit June 15 Sold 600 units June 21 Purchased 300 units @ $6 per unit June 24 Sold 800 units June 30 Purchased 100 units @ $8 per unit Required: Hill Marble uses a periodic inventory system. Calculate cost of goods sold (in both units and cost) for the month of June 2020 and ending inventory (units and cost) at June 30, 2020: a) FIFO. (8 marks) b) LIFO. (8 marks) c) Which method resulted in the highest cost of goods sold for June? (2 marks) d) Which one will provide the highest ending inventory value for Hill's balance sheet? (2 marks)